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1,746 sizes in 7 materials. Pick OD, ID and thickness to jump straight to the product.
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Rubber Washer 1-3/4" OD x 1-1/4" ID x 1/8" Thick
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Rubber Washer 1-3/4" OD x 1-1/4" ID x 3/32" Thick
Regular price $4.99Unit price
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Rubber Washer 1-3/4" OD x 1-1/4" ID x 1/16" Thick
Regular price $4.99Unit price
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Rubber Washer 1-3/4" OD x 7/8" ID x 3/16" Thick
Regular price $4.99Unit price
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Rubber Washer 1-3/4" OD x 7/8" ID x 3/32" Thick
Regular price $4.99Unit price
How Silicone compares with the other 6 materials
| Material | Service temperature | Oil & grease | Weather / UV | Water | Best for | Avoid |
|---|---|---|---|---|---|---|
| Neoprene | Temperature: from −40°F | Oil & grease: — | Weather / UV: — | Water: — | Best for: General purpose sealing, HVAC systems, marine hardware, plumbing | Avoid: Strong oxidizing acids, ketones, esters |
| EPDM | Temperature: — | Oil & grease: Poor | Weather / UV: Excellent | Water: Excellent | Best for: Outdoor and UV-exposed hardware, roofing, potable water systems, steam lines | Avoid: Petroleum oils, fuels, hydrocarbon solvents |
| Nitrile (Buna-N) | Temperature: — | Oil & grease: Excellent | Weather / UV: Poor | Water: Good | Best for: Automotive fuel systems, hydraulic equipment, oil and gas fittings | Avoid: Outdoor and UV-exposed use, ozone |
| Silicone | Temperature: — | Oil & grease: Poor | Weather / UV: Excellent | Water: Good | Best for: Food processing, high-temp appliances, medical equipment, electronics | Avoid: Petroleum oils, concentrated acids |
| Natural Rubber | Temperature: up to 180°F | Oil & grease: Poor | Weather / UV: Poor | Water: Good | Best for: High-abrasion applications, low-cost general sealing, vibration dampening | Avoid: Outdoor use, oil contact, ozone |
| Viton (FKM) | Temperature: −15°F to 400°F | Oil & grease: Excellent | Weather / UV: Excellent | Water: Good | Best for: Chemical processing, aerospace fuel systems, aggressive solvents | Avoid: Ketones, amines, low-molecular-weight esters |
| Fiber | Temperature: from −40°F | Oil & grease: Good | Weather / UV: Good | Water: — | Best for: Pipe flanges, compression fittings, plumbing gaskets, electrical insulation | Avoid: High-pressure steam, strong acids or alkalis |
A dash (—) means our published ratings differ for that property, so we don't show one. Need a firm figure? Ask us. Temperatures are shown only where every rating we publish agrees. See every size and what's in stock.
About Silicone Rubber Washers
Shop silicone rubber washers in every OD, ID and thickness we stock. Silicone is extreme temperature range and FDA-compliant grades available — making it the go-to choice for food processing, medical equipment, high-heat appliances and electronics. Rated for −85°F to 400°F. Fast shipping and bulk pricing on every order.
Not sure if Silicone is right for your job? Read our Silicone material guide for a full compound comparison, or compare all 7 washer materials side by side. New to washer sizing? See how to measure OD, ID & thickness, then shop the full catalog.
Popular Silicone uses: food-grade, electrical & electronics and HVAC.
Silicone washer properties
| Property | Rating |
|---|---|
| Temperature range | −85°F to 400°F — widest of any washer rubber |
| Food contact | FDA-compliant grades (CFR 177.2600) |
| UV / ozone resistance | Excellent |
| Electrical insulation | Excellent |
| Oil & fuel resistance | Poor — use nitrile or Viton |
| Tear resistance | Lower than other rubbers — protect from sharp edges |
| Typical hardness | 50–60 Shore A, stays soft across its range (durometer guide) |
When a silicone washer is the right call
Pick a silicone washer when temperature or purity rules the application: espresso machines and coffee equipment, ovens, dishwashers and steam appliances, heat lamps and lighting, sub-zero freezer hardware, medical devices, and food and beverage equipment where FDA compliance matters. Silicone also stays flexible at −85°F where every other rubber has gone rigid. Its trade-offs: it's softer and tears more easily than nitrile or EPDM, and petroleum oils degrade it — for hot oily service, Viton is the answer.
Silicone washer FAQ
Are silicone washers food safe?
FDA-compliant silicone grades are the standard for food-contact washers. If your application requires certified food-grade material, contact us to confirm grade documentation before ordering.
What temperature can silicone washers handle?
Continuous service from −85°F to 400°F — the widest range of any common washer material, and why silicone owns appliance and high-heat duty.
Silicone vs rubber washers — what's the difference?
Silicone is a rubber; the comparison people mean is silicone vs organic rubbers like EPDM or neoprene. Silicone wins on temperature extremes and food compliance; EPDM and neoprene are tougher and cheaper for ordinary water and weather duty.
Can I use silicone washers outdoors?
Yes — UV and ozone resistance are excellent. Just keep them away from oils and protect them from abrasion.